/*
 * Copyright (c) 2012, marco.tamburelli@gmail.com
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met: 
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.bmi.gwt.mi.server.impl;

import java.lang.reflect.Method;
import java.util.HashMap;

import org.bmi.gwt.mi.server.util.ServerUtil;
import org.bmi.gwt.mi.shared.MiObject;
import org.bmi.gwt.mi.shared.communication.ptypes.Param;
import org.bmi.gwt.mi.shared.util.ObjectWrapper;

public class ObjectWrapperServer implements ObjectWrapper
{
	private MiObject instance;
	private Class<? extends MiObject> instClass;

	private HashMap<String, Method> methodMap;

	protected ObjectWrapperServer()
	{
		this.methodMap = new HashMap<String, Method>();
	}

	@Override
	public void setInstance(MiObject instance)
	{
		this.instance = instance;
		this.instClass = instance.getClass();

		for (Method m : this.instClass.getMethods())
		{
			StringBuilder signature = new StringBuilder(m.getName());

			for (Class<?> t : m.getParameterTypes())
				signature.append(ServerUtil.getJNISignature(t));

			this.methodMap.put(signature.toString(), m);
		}
	}

	@Override
	public MiObject getInstance()
	{
		return this.instance;
	}

	@Override
	public Object invoke(String methodName, String methodSignature, HashMap<String, ObjectWrapper> objectMap,
			Param<?>[] args) throws Exception
	{
		Method m = this.methodMap.get(methodName + methodSignature);

		return m.invoke(this.instance, ParamConverter.convertParameters(objectMap, args, m.getParameterTypes()));
	}

	@Override
	public Object invoke(String methodName, String methodSignature, HashMap<String, Object> returnValueMap,
			HashMap<String, ObjectWrapper> objectMap, Param<?>[] args) throws Exception
	{
		Method m = this.methodMap.get(methodName + methodSignature);
		/*
		 * We have to ensure that the method is accessible at this point in case
		 * the instance is an anonymous implementations or default visible
		 * class.
		 */
		m.setAccessible(true);

		return m.invoke(this.instance,
				ParamConverter.convertParameters(returnValueMap, objectMap, args, m.getParameterTypes()));
	}
}
